settimeout unmount react

Coding Era answered on March 13, 2023 Popularity 3/10 Helpfulness 1/10

answer settimeout unmount react

settimeout unmount react

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  useEffect(
    () => {
      let timer1 = setTimeout(() => setShow(true), delay * 1000);

      // this will clear Timeout
      // when component unmount like in willComponentUnmount
      // and show will not change to true
      return () => {
        clearTimeout(timer1);
      };
    },
    // useEffect will run only one time with empty []
    // if you pass a value to array,
    // like this - [data]
    // than clearTimeout will run every time
    // this value changes (useEffect re-run)
    []
  );

Popularity 3/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript settimeout unmount

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Contributed on Mar 13 2023

Coding Era

0 Answers Avg Quality 2/10

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